Newbie question - wet weather racing gear

Newbie question time.

OJ's white rain suit set the cogs in motion. I was wondering what the go is with racing leathers in the wet. I presume he wore it to keep water out of his leathers, but most riders didn't have the suit, including Rossi. Do they put some sort of sealant on the leathers? What about gloves? (I noticed Rossi had rubber gloves under his leather gloves)

I'm also a bit surprised they were complaining so much about misting of the visors. I would have thought a bit of high tech should be able to keep enough air pushing across the inside of the visor to keep it fairly clear?

Dave8 you need to ride in the rain more mate, Its bloody impossible to keep a visor dry n fog free in my experience, as for the wet leather overalls its a matter of personal preference i believe. Either way at those speeds your gonna get wet Cods imho.
Cheers Brett

If i'm wearing my leathers and there's the chance of rain, I'll pack my wet weather overalls. If it starts raining I'll slip the overalls on over the top of the leathers.

mate..im too lazy to bother with wets..ive got em, but never use em, i just get wet...i have tried the gloves under the gloves trick, but it was so bloody uncomfortable...i guess they figure for 45min they can handle getting a bit damp, use to b a lot of em had the spray jacket, but not so many ne more...